Import Chrome's tts code
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Cheng Zhao
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chromium_src/chrome/renderer/tts_dispatcher.cc
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chromium_src/chrome/renderer/tts_dispatcher.cc
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "chrome/renderer/tts_dispatcher.h"
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#include "base/basictypes.h"
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#include "base/strings/utf_string_conversions.h"
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#include "chrome/common/tts_messages.h"
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#include "chrome/common/tts_utterance_request.h"
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#include "content/public/renderer/render_thread.h"
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#include "third_party/WebKit/public/platform/WebCString.h"
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#include "third_party/WebKit/public/platform/WebSpeechSynthesisUtterance.h"
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#include "third_party/WebKit/public/platform/WebSpeechSynthesisVoice.h"
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#include "third_party/WebKit/public/platform/WebString.h"
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#include "third_party/WebKit/public/platform/WebVector.h"
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using content::RenderThread;
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using blink::WebSpeechSynthesizerClient;
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using blink::WebSpeechSynthesisUtterance;
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using blink::WebSpeechSynthesisVoice;
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using blink::WebString;
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using blink::WebVector;
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int TtsDispatcher::next_utterance_id_ = 1;
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TtsDispatcher::TtsDispatcher(WebSpeechSynthesizerClient* client)
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: synthesizer_client_(client) {
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RenderThread::Get()->AddObserver(this);
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}
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TtsDispatcher::~TtsDispatcher() {
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RenderThread::Get()->RemoveObserver(this);
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}
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bool TtsDispatcher::OnControlMessageReceived(const IPC::Message& message) {
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IPC_BEGIN_MESSAGE_MAP(TtsDispatcher, message)
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IPC_MESSAGE_HANDLER(TtsMsg_SetVoiceList, OnSetVoiceList)
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IPC_MESSAGE_HANDLER(TtsMsg_DidStartSpeaking, OnDidStartSpeaking)
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IPC_MESSAGE_HANDLER(TtsMsg_DidFinishSpeaking, OnDidFinishSpeaking)
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IPC_MESSAGE_HANDLER(TtsMsg_DidPauseSpeaking, OnDidPauseSpeaking)
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IPC_MESSAGE_HANDLER(TtsMsg_DidResumeSpeaking, OnDidResumeSpeaking)
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IPC_MESSAGE_HANDLER(TtsMsg_WordBoundary, OnWordBoundary)
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IPC_MESSAGE_HANDLER(TtsMsg_SentenceBoundary, OnSentenceBoundary)
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IPC_MESSAGE_HANDLER(TtsMsg_MarkerEvent, OnMarkerEvent)
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IPC_MESSAGE_HANDLER(TtsMsg_WasInterrupted, OnWasInterrupted)
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IPC_MESSAGE_HANDLER(TtsMsg_WasCancelled, OnWasCancelled)
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IPC_MESSAGE_HANDLER(TtsMsg_SpeakingErrorOccurred, OnSpeakingErrorOccurred)
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IPC_END_MESSAGE_MAP()
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// Always return false because there may be multiple TtsDispatchers
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// and we want them all to have a chance to handle this message.
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return false;
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}
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void TtsDispatcher::updateVoiceList() {
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RenderThread::Get()->Send(new TtsHostMsg_InitializeVoiceList());
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}
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void TtsDispatcher::speak(const WebSpeechSynthesisUtterance& web_utterance) {
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int id = next_utterance_id_++;
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utterance_id_map_[id] = web_utterance;
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TtsUtteranceRequest utterance;
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utterance.id = id;
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utterance.text = web_utterance.text().utf8();
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utterance.lang = web_utterance.lang().utf8();
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utterance.voice = web_utterance.voice().utf8();
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utterance.volume = web_utterance.volume();
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utterance.rate = web_utterance.rate();
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utterance.pitch = web_utterance.pitch();
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RenderThread::Get()->Send(new TtsHostMsg_Speak(utterance));
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}
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void TtsDispatcher::pause() {
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RenderThread::Get()->Send(new TtsHostMsg_Pause());
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}
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void TtsDispatcher::resume() {
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RenderThread::Get()->Send(new TtsHostMsg_Resume());
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}
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void TtsDispatcher::cancel() {
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RenderThread::Get()->Send(new TtsHostMsg_Cancel());
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}
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WebSpeechSynthesisUtterance TtsDispatcher::FindUtterance(int utterance_id) {
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base::hash_map<int, WebSpeechSynthesisUtterance>::const_iterator iter =
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utterance_id_map_.find(utterance_id);
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if (iter == utterance_id_map_.end())
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return WebSpeechSynthesisUtterance();
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return iter->second;
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}
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void TtsDispatcher::OnSetVoiceList(const std::vector<TtsVoice>& voices) {
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WebVector<WebSpeechSynthesisVoice> out_voices(voices.size());
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for (size_t i = 0; i < voices.size(); ++i) {
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out_voices[i] = WebSpeechSynthesisVoice();
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out_voices[i].setVoiceURI(WebString::fromUTF8(voices[i].voice_uri));
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out_voices[i].setName(WebString::fromUTF8(voices[i].name));
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out_voices[i].setLanguage(WebString::fromUTF8(voices[i].lang));
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out_voices[i].setIsLocalService(voices[i].local_service);
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out_voices[i].setIsDefault(voices[i].is_default);
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}
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synthesizer_client_->setVoiceList(out_voices);
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}
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void TtsDispatcher::OnDidStartSpeaking(int utterance_id) {
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if (utterance_id_map_.find(utterance_id) == utterance_id_map_.end())
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return;
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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synthesizer_client_->didStartSpeaking(utterance);
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}
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void TtsDispatcher::OnDidFinishSpeaking(int utterance_id) {
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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synthesizer_client_->didFinishSpeaking(utterance);
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utterance_id_map_.erase(utterance_id);
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}
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void TtsDispatcher::OnDidPauseSpeaking(int utterance_id) {
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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synthesizer_client_->didPauseSpeaking(utterance);
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}
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void TtsDispatcher::OnDidResumeSpeaking(int utterance_id) {
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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synthesizer_client_->didResumeSpeaking(utterance);
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}
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void TtsDispatcher::OnWordBoundary(int utterance_id, int char_index) {
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CHECK(char_index >= 0);
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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synthesizer_client_->wordBoundaryEventOccurred(
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utterance, static_cast<unsigned>(char_index));
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}
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void TtsDispatcher::OnSentenceBoundary(int utterance_id, int char_index) {
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CHECK(char_index >= 0);
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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synthesizer_client_->sentenceBoundaryEventOccurred(
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utterance, static_cast<unsigned>(char_index));
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}
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void TtsDispatcher::OnMarkerEvent(int utterance_id, int char_index) {
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// Not supported yet.
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}
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void TtsDispatcher::OnWasInterrupted(int utterance_id) {
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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// The web speech API doesn't support "interrupted".
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synthesizer_client_->didFinishSpeaking(utterance);
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utterance_id_map_.erase(utterance_id);
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}
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void TtsDispatcher::OnWasCancelled(int utterance_id) {
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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// The web speech API doesn't support "cancelled".
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synthesizer_client_->didFinishSpeaking(utterance);
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utterance_id_map_.erase(utterance_id);
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}
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void TtsDispatcher::OnSpeakingErrorOccurred(int utterance_id,
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const std::string& error_message) {
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WebSpeechSynthesisUtterance utterance = FindUtterance(utterance_id);
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if (utterance.isNull())
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return;
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// The web speech API doesn't support an error message.
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synthesizer_client_->speakingErrorOccurred(utterance);
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utterance_id_map_.erase(utterance_id);
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}
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78
chromium_src/chrome/renderer/tts_dispatcher.h
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chromium_src/chrome/renderer/tts_dispatcher.h
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CHROME_RENDERER_TTS_DISPATCHER_H_
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#define CHROME_RENDERER_TTS_DISPATCHER_H_
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#include <vector>
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#include "base/basictypes.h"
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#include "base/compiler_specific.h"
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#include "base/containers/hash_tables.h"
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#include "content/public/renderer/render_process_observer.h"
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#include "third_party/WebKit/public/platform/WebSpeechSynthesizer.h"
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#include "third_party/WebKit/public/platform/WebSpeechSynthesizerClient.h"
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namespace IPC {
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class Message;
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}
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struct TtsVoice;
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// TtsDispatcher is a delegate for methods used by Blink for speech synthesis
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// APIs. It's the complement of TtsDispatcherHost (owned by RenderViewHost).
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// Each TtsDispatcher is owned by the WebSpeechSynthesizerClient in Blink;
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// it registers itself to listen to IPC upon construction and unregisters
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// itself when deleted. There can be multiple TtsDispatchers alive at once,
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// so each one routes IPC messages to its WebSpeechSynthesizerClient only if
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// the utterance id (which is globally unique) matches.
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class TtsDispatcher
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: public blink::WebSpeechSynthesizer,
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public content::RenderProcessObserver {
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public:
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explicit TtsDispatcher(blink::WebSpeechSynthesizerClient* client);
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private:
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virtual ~TtsDispatcher();
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// RenderProcessObserver override.
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virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
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// blink::WebSpeechSynthesizer implementation.
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virtual void updateVoiceList() OVERRIDE;
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virtual void speak(const blink::WebSpeechSynthesisUtterance& utterance)
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OVERRIDE;
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virtual void pause() OVERRIDE;
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virtual void resume() OVERRIDE;
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virtual void cancel() OVERRIDE;
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blink::WebSpeechSynthesisUtterance FindUtterance(int utterance_id);
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void OnSetVoiceList(const std::vector<TtsVoice>& voices);
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void OnDidStartSpeaking(int utterance_id);
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void OnDidFinishSpeaking(int utterance_id);
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void OnDidPauseSpeaking(int utterance_id);
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void OnDidResumeSpeaking(int utterance_id);
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void OnWordBoundary(int utterance_id, int char_index);
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void OnSentenceBoundary(int utterance_id, int char_index);
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void OnMarkerEvent(int utterance_id, int char_index);
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void OnWasInterrupted(int utterance_id);
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void OnWasCancelled(int utterance_id);
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void OnSpeakingErrorOccurred(int utterance_id,
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const std::string& error_message);
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// The WebKit client class that we use to send events back to the JS world.
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// Weak reference, this will be valid as long as this object exists.
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blink::WebSpeechSynthesizerClient* synthesizer_client_;
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// Next utterance id, used to map response IPCs to utterance objects.
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static int next_utterance_id_;
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// Map from id to utterance objects.
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base::hash_map<int, blink::WebSpeechSynthesisUtterance> utterance_id_map_;
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DISALLOW_COPY_AND_ASSIGN(TtsDispatcher);
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};
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#endif // CHROME_RENDERER_TTS_DISPATCHER_H_
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